3.2 Six Sleep Modes

The following table shows the different sleep modes, BOD disable ability, and their wake-up sources.

Table 3-1. Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
	Active clock domains						Oscillators		Wake-up sources								Software BOD disable
Sleep Mode	clk_CPU	clk_FLASH	clk_IO	clk_ADC	clk_ASY	clk_PTC	Main clock sSource enabled	Timer oscillator enabled	INT and PCINT	TWI address mMatch	Timer2	SPM/EEPROM ready	ADC	WDT	USART⁽⁴⁾	Other I/O	Software BOD disable
Idle			Yes	Yes	Yes	Yes	Yes	Yes⁽²⁾	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ADC Noise Reduction				Yes	Yes	Yes	Yes	Yes⁽²⁾	Yes⁽³⁾	Yes	Yes⁽²⁾	Yes	Yes	Yes	Yes
Power-down									Yes⁽³⁾	Yes				Yes	Yes		Yes
Power-save					Yes	Yes	Yes	Yes⁽²⁾	Yes⁽³⁾	Yes	Yes			Yes	Yes		Yes
Standby⁽¹⁾							Yes		Yes⁽³⁾	Yes				Yes	Yes		Yes
Extended Standby					Yes⁽²⁾	Yes	Yes	Yes⁽²⁾	Yes⁽³⁾	Yes	Yes			Yes	Yes		Yes

Note:

For more details about all six sleep modes, refer to the Atmel ATmega328PB datasheet available at http://www.atmel.com/devices/ATMEGA328PB.aspx.